I have always loved this scene from Young Mr. Lincoln (1939). Few things are more enjoyable for a trial attorney than a cross examination that is tearing up the opposition case! Of course in real life in the video above the prosecutor would be on his feet constantly objecting: Argumentative! Assumes facts not in evidence! Mr. Lincoln is using a document that has not been admitted into evidence! If Mr. Lincoln is going to testify let him be sworn in! Etc. Of course this was done at a time when most judges tended to give a great deal of lee-way to counsel in their questioning of witnesses, especially in a frontier court and the jury might assume with frequent objections that the prosecutor was attempting to keep the truth from them and vote not guilty as a result. In any case it is a great scene.